Multi-agent setups are how production-grade agent work scales. The canonical pattern is a coordinator that decomposes a task and delegates each piece to a specialist worker, then merges the results. Each agent has its own brain, its own tools, its own system prompt, which makes it easy to route cheap turns to a cheap model and premium turns to a premium one. The cost story alone is usually enough to justify going multi-agent on any non-trivial task.
Engineering notes from the Digitorn team. No marketing, no launch announcements, no "10 prompts that will change your life". Just the things we write that we'd want to read.